Bugzilla bug 232120: Now NetBSD has pthread support, remove code that

prevents from using pthreads on NetBSD.  The patch is contributed by
Shin'ichiro TAYA <taya@netbsd.org>.  r=wtc. sr=darin.

configure.in

@@ -2251,9 +2251,6 @@ then
 				CXXFLAGS="$CXXFLAGS -mt" 
 			fi
 			;;
-	*-*-netbsd*)
-		USE_PTHREADS=
-		_PTHREAD_LDFLAGS=
 	esac
 fi